1Feed the starter by weighing out 35g of starter in a clean jar, add 175g of warm water and 175g of flour, mix it together and leave it on the counter top for about 6 hours until it doubles in size.
2In a big bowl, start with 460 ml of warm water, add 320g of active starter and 2 tsp of sea salt.
3Mix it until you can't really mix it anymore, then switch to using your hands to knead the dough for 5-8 minutes.
4Form the dough into a ball, cover with a towel and leave it for 3 hours on the counter.
5After 3 hours, the dough should have doubled in size. Prepare the banneton baskets by lining them with a little bit of flour.
6Split the dough in half, gently remove air bubbles, and shape each half into a round ball.
7Place each dough ball in a banneton basket, cover with a cloth and refrigerate overnight.
8The next morning, preheat the oven to 445 degrees. Take the dough out of the baskets and place it on parchment paper.
9Score the bread using a bread lame.
10Place the bread in a dutch oven and bake for 25 minutes with the lid on, then 25 minutes with the lid off. Let it cool for 2 hours before slicing.